Synthesis of rutherfordium isotopes in the U-238(Mg-26, xn)(264-x)Rf reaction and study of their decay properties Academic Article uri icon


  • Isotopes of rutherfordium (Rf258-261) were produced in irradiations of U238 targets with Mg26 beams. Excitation functions were measured for the 4n,5n, and 6n exit channels. Production of Rf261 in the 3n exit channel with a cross section of 28-26+92 pb was observed. -decay of Rf258 was observed for the first time with an -particle energy of 9.05 0.03 MeV and an /total-decay branching ratio of 0.31 0.11. In Rf259, the electron capture/total-decay branching ratio was measured to be 0.150.04. The measured half-lives for Rf258, Rf259, and Rf260 were 14.7-1.0+1.2 ms, 2.5-0.3+0.4 s, and 22.2-2.4+3.0 ms, respectively, in agreement with literature data. The systematics of the -decay Q-values and of the partial spontaneous fission half-lives were evaluated for even-even nuclides in the region of the N=152,Z=100 deformed shell. The influence of the N=152 shell on the -decay Q-values for rutherfordium was observed to be similar to that of the lighter elements (96Z102). However, the N=152 shell does not stabilize the rutherfordium isotopes against spontaneous fission, as it does in the lighter elements (96Z102). 2008 The American Physical Society.

published proceedings


altmetric score

  • 3

author list (cited authors)

  • Gates, J. M., Garcia, M. A., Gregorich, K. E., Duellmann, C. E., Dragojevic, I., Dvorak, J., ... Nitsche, H.

citation count

  • 58

complete list of authors

  • Gates, JM||Garcia, MA||Gregorich, KE||Duellmann, Ch E||Dragojevic, I||Dvorak, J||Eichler, R||Folden, CMIII||Loveland, W||Nelson, SL||Pang, GK||Stavsetra, L||Sudowe, R||Tuerler, A||Nitsche, H

publication date

  • March 2008